CalendarExtender: Anyway to AutoPostBack?

I'd like to cause a post back when a user selects a date using the CalendarExtender. Anyway to do this?

You could try this...

1) Add the following code to your page's OnLoad event - this basically registers a function to handle the calendar date selection change on the client and force a postback (sorry if you're a C# person)

Protected Sub Page_Load(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles Me.LoadConst strKeyAs String ="calendarExtenderPostback"If Not Me.ClientScript.IsClientScriptBlockRegistered(Me.GetType(), strKey)Then Dim pboAs PostBackOptions =New PostBackOptions(Me) pbo.AutoPostBack =True pbo.RequiresJavaScriptProtocol =False pbo.PerformValidation =True Dim strScriptAs String =String.Format("function calendarExtenderPostback(e) {{ {0} }}",Me.ClientScript.GetPostBackEventReference(pbo).ToString)Me.ClientScript.RegisterClientScriptBlock(Me.GetType(), strKey, strScript,True)End If End Sub

2) Add the following markup to your page to create the script manager, textbox and calendar extender... NB the use of OnClientDateSelectionChanged

<asp:ScriptManagerID="ScriptManager1"runat="server"></asp:ScriptManager>
<asp:TextBoxID="DateTextBox"runat="server"/>
<ajaxToolkit:CalendarExtenderID="CalendarExtender1"runat="server"TargetControlID="DateTextBox"Format="dd MMM yyyy"OnClientDateSelectionChanged="calendarExtenderPostback"/>

This works...to a point. It causes a postback, but not one that UpdatePanels seem to recognize. When I cause a postback using a button the content on my page in updatepanel's correctly updates. When I use the CalendarExtender autopostback method you described, the whole page refreshes. Any ideas?

There are quite a few posts on these forums for forcing an UpdatePanel to postback... it doesn't look like there currently a "correct" method of doing this (e.g. UpdatePanel.Update()) - though I might be wrong...

Suggestions include having a hidden button (using style="display: none") in your UpdatePanel which triggers the update.

You can then force the Click event for this in the code I described above (instead of the postback code)... which will in turn force the UpdatePanel to update!

This post may help...http://forums.asp.net/thread/1426873.aspx

Hope this makes sense!